diff options
| author | Simon Ser <contact@emersion.fr> | 2021-07-08 13:39:33 +0200 |
|---|---|---|
| committer | Simon Zeni <simon@bl4ckb0ne.ca> | 2021-07-08 10:08:47 -0400 |
| commit | e035f2b9c42b39e3eff37d0fe98bfa6422877d7a (patch) | |
| tree | 659e6433536a86e861d8cf8e86a9bdc2f575280d /backend/libinput/backend.c | |
| parent | b934fbaf046126705b96e5253551ccab64a72320 (diff) | |
Fix invalid uses of wl_array_for_each
[1] and [2] have introduced new wl_array usage in wlroots, but
contains a mistake: wl_array_for_each iterates over pointers to
the wl_array entries, not over entries themselves.
Fix all wl_array_for_each call sites. Name the variables "ptr"
to avoid confusion.
Found via ASan:
==148752==ERROR: AddressSanitizer: attempting free on address which was not malloc()-ed: 0x602000214111 in thread T0
#0 0x7f6ff2235f19 in __interceptor_free /build/gcc/src/gcc/libsanitizer/asan/asan_malloc_linux.cpp:127
#1 0x7f6ff1c04004 in wlr_tablet_destroy ../subprojects/wlroots/types/wlr_tablet_tool.c:24
#2 0x7f6ff1b8463c in wlr_input_device_destroy ../subprojects/wlroots/types/wlr_input_device.c:51
#3 0x7f6ff1ab9941 in backend_destroy ../subprojects/wlroots/backend/wayland/backend.c:306
#4 0x7f6ff1a68323 in wlr_backend_destroy ../subprojects/wlroots/backend/backend.c:57
#5 0x7f6ff1ab36b4 in multi_backend_destroy ../subprojects/wlroots/backend/multi/backend.c:57
#6 0x7f6ff1ab417c in handle_display_destroy ../subprojects/wlroots/backend/multi/backend.c:124
#7 0x7f6ff106184e in wl_display_destroy (/usr/lib/libwayland-server.so.0+0x884e)
#8 0x55cd1a77c9e5 in server_fini ../sway/server.c:218
#9 0x55cd1a77893f in main ../sway/main.c:400
#10 0x7f6ff04bdb24 in __libc_start_main (/usr/lib/libc.so.6+0x27b24)
#11 0x55cd1a73a7ad in _start (/home/simon/src/sway/build/sway/sway+0x33a7ad)
0x602000214111 is located 1 bytes inside of 16-byte region [0x602000214110,0x602000214120)
freed by thread T0 here:
#0 0x7f6ff2235f19 in __interceptor_free /build/gcc/src/gcc/libsanitizer/asan/asan_malloc_linux.cpp:127
#1 0x7f6ff1c04004 in wlr_tablet_destroy ../subprojects/wlroots/types/wlr_tablet_tool.c:24
#2 0x7f6ff1b8463c in wlr_input_device_destroy ../subprojects/wlroots/types/wlr_input_device.c:51
#3 0x7f6ff1ab9941 in backend_destroy ../subprojects/wlroots/backend/wayland/backend.c:306
#4 0x7f6ff1a68323 in wlr_backend_destroy ../subprojects/wlroots/backend/backend.c:57
#5 0x7f6ff1ab36b4 in multi_backend_destroy ../subprojects/wlroots/backend/multi/backend.c:57
#6 0x7f6ff1ab417c in handle_display_destroy ../subprojects/wlroots/backend/multi/backend.c:124
#7 0x7f6ff106184e in wl_display_destroy (/usr/lib/libwayland-server.so.0+0x884e)
previously allocated by thread T0 here:
#0 0x7f6ff2236279 in __interceptor_malloc /build/gcc/src/gcc/libsanitizer/asan/asan_malloc_linux.cpp:145
#1 0x7f6ff1066d03 in wl_array_add (/usr/lib/libwayland-server.so.0+0xdd03)
[1]: https://github.com/swaywm/wlroots/pull/3002
[2]: https://github.com/swaywm/wlroots/pull/3004
Diffstat (limited to 'backend/libinput/backend.c')
| -rw-r--r-- | backend/libinput/backend.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/backend/libinput/backend.c b/backend/libinput/backend.c index a9595df2..c7bde4a9 100644 --- a/backend/libinput/backend.c +++ b/backend/libinput/backend.c @@ -141,13 +141,13 @@ static void backend_destroy(struct wlr_backend *wlr_backend) { struct wlr_libinput_backend *backend = get_libinput_backend_from_backend(wlr_backend); - struct wl_list *wlr_devices; - wl_array_for_each(wlr_devices, &backend->wlr_device_lists) { + struct wl_list **wlr_devices_ptr; + wl_array_for_each(wlr_devices_ptr, &backend->wlr_device_lists) { struct wlr_input_device *wlr_dev, *next; - wl_list_for_each_safe(wlr_dev, next, wlr_devices, link) { + wl_list_for_each_safe(wlr_dev, next, *wlr_devices_ptr, link) { wlr_input_device_destroy(wlr_dev); } - free(wlr_devices); + free(*wlr_devices_ptr); } wlr_backend_finish(wlr_backend); |